Polarstar UGS CO2 Insert - 12g Milspec Add to Cart

• Equipped with integral expansion chamber, anti-siphon system, 5 micron filter and check valve to prevent liquid CO2 from entering the regulator regardless of the rifle's or air rig's orientation
• Also prevents gases from escaping the expansion chamber while switching out cartridges so as to conserve as much CO2 as possible when performing a "combat reload" and allowing several full-power shots even while when the CO2 cartridge has been removed
• Will average approximately 180 shots based on an F2 running at 1.5J w/ .28g through a 6.05x380mm barrel
• Standard ASA threads on all inserts allowing use with standard HPA regulators/air rigs
• UGS requires addition of Milspec Rail (sold separately) before inserts can be used
• Made to the same diameter as a Milspec buffer tube
• CO2 Cartridges Not Included